Math, asked by darrenjoy, 19 days ago

cos (a+b)=?

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Answers

Answered by rionapilli63

0

Answer:

cos(a)×cos(b) - sin(a )× sin(b)

Answered by tajit9914

1

Answer:

cosa.cosb-sina.sinb.

Step-by-step explanation:

cos(a+b)=cosa.cosb-sina.sinb

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